docs: def api_call(self, method, **params):
          """
          Call Telegram API.
  
          See https://core.telegram.org/bots/api for reference.
  
          :param str method: Telegram API method
          :param params: Arguments for the method call
          """
          coro = self._api_call(method, **params)
          # Explicitly ensure that API call is executed
          return asyncio.ensure_future(coro)